Results 61 to 70 of about 295 (135)
Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy‐Ion Collisions
Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.ABSTRACT Vector U‐bosons, often referred to as “dark photons,” are potential candidates for mediating dark matter interactions. In this study, we outline a procedure to derive theoretical constraints on the upper bound of the kinetic mixing parameter ϵ2MU$$ {\upvarepsilon}^2\left({M}_U\right) $$ using dilepton data from heavy‐ion from SIS to RHIC ...
Adrian William Romero Jorge +3 more
wiley +1 more source
Relativistic corrections to the pair Bc-meson production in e+e− annihilation
Nuclear Physics B, 2016 Relativistic corrections to the pair Bc-meson production in e+e−-annihilation are calculated. We investigate a production of pair pseudoscalar, vector and pseudoscalar+vector Bc-mesons in the leading order perturbative quantum chromodynamics and ...
A.A. Karyasov +2 more
doaj +1 more source
Study of Semileptonic B⟶DPℓ+νℓ Decays Based on the SU(3) Flavor Symmetry
Advances in High Energy Physics, Volume 2025, Issue 1, 2025.Decays B⟶DPℓ+νℓ(ℓ = e, μ, τ) with the nonresonance, the charmed vector resonances, the charmed scalar resonances, and the charmed tensor resonances are explored by using the SU(3) flavor symmetry approach. Firstly, the decay amplitudes of different modes are related by the SU(3) flavor symmetry.
Ru-Min Wang +5 more
wiley +1 more source
Light pseudoscalar meson and heavy meson scattering lengths
Physical Review D, 2009 We have performed a systematical calculation of the pion ($π, K, η$) and heavy pseudoscalar meson S-wave scattering lengths up to ${\cal O}(p^3)$ in the chiral perturbation theory in the heavy quark symmetry limit. With the three scattering lengths from the lattice simulations as input we estimate the unknown low-energy constants.
Liu, Yan-Rui, Liu, Xiang, Zhu, Shi-Lin
openaire +2 more sources
Leptonic and semileptonic decays of pseudoscalar mesons [PDF]
Physics Letters B, 1999 We employ the relativistic constituent quark model to give a unified description of the leptonic and semileptonic decays of pseudoscalar mesons (π, K, D, D_s, B, B_s). The calculated leptonic decay constants and form factors are found to be in good agreement with available experimental data and other approaches.
M. A. IVANOV, SANTORELLI, PIETRO
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Physics Letters B, 2017 The Covariant Spectator Theory (CST) is used to calculate the mass spectrum and vertex functions of heavy–light and heavy mesons in Minkowski space. The covariant kernel contains Lorentz scalar, pseudoscalar, and vector contributions.
Sofia Leitão +3 more
doaj +1 more source
Tensor Condensate Accompanied by Chiral Transition in a Strong Magnetic Field
Advances in High Energy Physics, Volume 2025, Issue 1, 2025.We investigate tensor condensates and chiral condensates in the (2 + 1)‐flavor Nambu–Jona–Lasinio model at finite temperature and density in the presence of a strong magnetic field. The emergence of the tensor condensate is attributed to the four‐fermion interaction.
Yuan-Hao Niu +2 more
wiley +1 more source
Exploring solutions to the muon g-2 anomaly in a 3-3-1 model under flavor constraints
European Physical Journal C: Particles and FieldsThe magnetic moment of the muon can receive significant two-loop contributions from a light pseudoscalar. Notably, the spectrum of scalars of 3-3-1 models includes one pseudoscalar.
A. Doff +2 more
doaj +1 more source
Millimeter‐Wave WISP Search with Coherent Light‐Shining‐Through‐a‐Wall Toward the STAX Project
Annalen der Physik, Volume 536, Issue 1, January 2024.This research article shows potential of millimeter waves for searching dark photons, one of the candidates of dark matter. By sharing a common reference signal, an excellent temporal coherency is achieved between production and detection of dark photons.
Akira Miyazaki +7 more
wiley +1 more source
The annihilation of virtual photons into pseudoscalar mesons [PDF]
The European Physical Journal C, 2001 We investigate the possibility to constrain the pion distribution amplitude from the gamma* gamma* -> pi transition. For a surprisingly large range in the two photon virtualities we find that the transition form factor is essentially independent of the distribution amplitude. This in turn entails a parameter-free prediction of QCD. The gamma* gamma*
Diehl, M., Kroll, P., Vogt, C.
openaire +3 more sources